An esophageal spasm occurs when the esophageal muscles contract abnormally. (These muscles are located in the esophagus, the tube that carries food to the stomach.) Often triggered by eating ...

The digestive condition occurs when stomach acid flows back up into the esophagus, irritating the diaphragm and causing involuntary muscle spasms. GERD often causes a burning sensation in the ...

"Muscle spasms usually occur in the calf or thigh ... and sometimes even in one's stomach muscles or along the rib cage. "They can involve part or all of a muscle or several muscles in a group ...